Compost spatial heterogeneity promotes evolutionary diversification of a bacterium.

Compost spatial heterogeneity promotes evolutionary diversification of a bacterium.
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堆肥空间异质性促进细菌的进化多样化。

DOI:
10.1111/jeb.13722
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发表时间:
2021-03
影响因子:
2.1
通讯作者:
Buckling A
Buckling A
中科院分区:
生物学3区
文献类型:
--
作者:
van Houte S;Padfield D;Gómez P;Luján AM;Brockhurst MA;Paterson S;Buckling A

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空间资源异质性预计将成为多样性演变的关键驱动力。然而,这一预测的直接实证支持仅限于在简化的实验室环境中进行的研究。在这里,我们调查如何改变盆栽堆肥的空间异质性,通过添加水和混合,影响细菌物种,荧光假单胞菌,这是自然发现的环境中的进化多样化。有一个更大的倾向,资源专家在未经处理的堆肥演变,而更通才的表型占主导地位的堆肥水的混合。基因组数据与这些表型结果一致。竞争实验强烈表明,这些结果是由于多样化的选择,作为资源异质性的结果,而不是其他协变量。总的来说,我们的研究结果证实了理论和体外研究结果,但在半自然,更现实的条件下。
Spatial resource heterogeneity is expected to be a key driver for the evolution of diversity. However, direct empirical support for this prediction is limited to studies carried out in simplified laboratory environments. Here, we investigate how altering spatial heterogeneity of potting compost—by the addition of water and mixing—affects the evolutionary diversification of a bacterial species, Pseudomonas fluorescens, that is naturally found in the environment. There was a greater propensity of resource specialists to evolve in the unmanipulated compost, while more generalist phenotypes dominated the compost–water mix. Genomic data were consistent with these phenotypic findings. Competition experiments strongly suggest these results are due to diversifying selection as a result of resource heterogeneity, as opposed to other covariables. Overall, our findings corroborate theoretical and in vitro findings, but in semi‐natural, more realistic conditions.
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